TPCO
Filed: July 11, 1973
PRE-INSULATED PIPE
Owned by: TPCO, INC.
Serial Number: 72462599
DUPLEX-50
Filed: September 29, 1975
PRE-INSULATED DUAL PIPING SYSTEMS, CONSISTING OF TWO FLUID CARRIER PIPES PREDOMINANTLY OF METAL AND ALSO PLASTIC WITHIN…
Owned by: TPCO, INC.
Serial Number: 73064534
IMPEDATHERM
Filed: January 3, 1980
Heating Systems Comprising a Source of Electric Power and an Electric Heating Element for Heating Fluid Transport Pipe
Owned by: TPCO, INC.
Serial Number: 73244840
SURTEN-HEET
Filed: January 3, 1980
Heating Systems Comprising a Skin Effect Heating Element in the Nature of a Hollow Conductive Tube with an Enclosed Electrical…
Owned by: TPCO, INC.
Serial Number: 73245050
SELECTRA
Filed: March 2, 1981
Heating Systems Comprising a Skin Effect Heating Element and a Source of Electric Current for Heating Fluid Transport Pipe…
Owned by: TPCO, INC.
Serial Number: 73299423
